According to the graph, we can actually say that: The global surface temperature average was significantly lower during the period from 1850 to 1910.
What is temperature?
Temperature is actually known as the physical quantity which is usually used to express the degree of hotness and coldness of a matter. It is used to show the thermal energy that matter possesses.
We can see from the graph that the global surface temperature average was significantly lower during the period from 1850 to 1910.
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